#include<iostream>
#include<vector>
#include<algorithm>
#include<string>

using namespace std;

struct point{
  int x,y,idx;
  point* hor,*ver;
};

bool sortxfunc(const point* a,const point* b){
  if (a->x<b->x) return true;
  return (a->x == b->x && a->y<b->y);
}

bool sortyfunc(const point* a,const point* b){
  if (a->y<b->y) return true;
  return (a->y == b->y && a->x<b->x);
}

int main(){
  int N;
  while(1){
    cin>>N;
    if (N==0)
      return 0;
    vector<point> origpoints (N);
    vector<point*> points(N);
    for (int i=0;i<N;i++){
      points[i]=&origpoints[i];
      int x,y;
      cin>>x>>y;
      points[i]->x=x;
      points[i]->y=y;
      points[i]->idx=i;
      points[i]->hor=NULL;
      points[i]->ver=NULL;
    }
    sort(points.begin(),points.end(),sortxfunc);
    //    cout<<"sortx"<<endl;
    for (unsigned i=0;i<points.size();i+=2){
      /*
      cout<<points[i]->x<<' '<<points[i]->y<<' '<<endl;
      i++;
      cout<<points[i]->x<<' '<<points[i]->y<<' '<<endl;
      i--;
      **/
      points[i]->ver=points[i+1];
      points[i+1]->ver=points[i];
    }
    sort(points.begin(),points.end(),sortyfunc);
    //    cout<<"sorty"<<endl;
    for (unsigned i=0;i<points.size();i+=2){
      /*
      cout<<points[i]->x<<' '<<points[i]->y<<' '<<endl;
      i++;
      cout<<points[i]->x<<' '<<points[i]->y<<' '<<endl;
      i--;
      */
      points[i]->hor=points[i+1];
      points[i+1]->hor=points[i];
    }
    bool hor=true;
    point* cur = points[1];
    //  cout<<"prepare"<<endl;
    while(cur->idx!=0){
      //      cout<<cur->idx<<endl;
      if (hor){
	cur = cur->hor;
	hor=false;
      }
      else{
	cur = cur->ver;
	hor = true;
      }
    }
    string output="";
    //  cout<<"Start"<<endl;
    do{
      //      cout<<cur->idx<<endl;
      if (hor){
	if (cur->x > cur->hor->x){
	  output+='W';
	}
	else{
	  output+='E';
	}
	hor=false;
	cur = cur->hor;
      }
      else{
	if (cur->y > cur->ver->y){
	  output+='S';
	}
	else{
	  output+='N';
	}
	hor=true;
	cur = cur->ver;
      }
    }
    while(cur->idx!=0);
    cout<<output<<endl;
  }
}